Reclaimed wastewater: Impact on soil-plant system under tropical conditions

被引：52

作者：

Pereira, B. F. F. ^{[1
,2
]}

He, Z. L. ^{[2
]}

Silva, M. S. ^{[3
]}

Herpin, U. ^{[1
]}

Nogueira, S. F. ^{[1
,4
]}

Montes, C. R. ^{[5
]}

Melfi, A. J. ^{[6
]}

机构：

[1] Univ Sao Paulo, Res Ctr Geochem & Geophys Lithosphere, BR-13418900 Sao Paulo, Brazil

[2] Univ Florida, Inst Food & Agr Sci, Indian River Res & Educ Ctr, Ft Pierce, FL 34945 USA

[3] Univ Sao Paulo, Dept Hydraul Engn & Sanitat, BR-13566590 Sao Paulo, Brazil

[4] Embrapa Satellite Monitoring, BR-13070115 Sao Paulo, Brazil

[5] Univ Sao Paulo, Ctr Nucl Energy Agr, BR-13416903 Sao Paulo, Brazil

[6] Univ Sao Paulo, Dept Soil Sci, BR-13418900 Sao Paulo, Brazil

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2011年 / 192卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

Urban effluent; Wastewater disposal; Water reuse; Ionic speciation; Al toxicity; Acidic soil; POLYCYCLIC AROMATIC-HYDROCARBONS; HEAVY-METALS; ALUMINUM TOXICITY; SEWAGE-SLUDGE; IRRIGATION; SPECIATION; EFFLUENT;

D O I：

10.1016/j.jhazmat.2011.04.095

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study investigated the ionic speciation of reclaimed urban wastewater (RWW), and the impact of increasing RWW irrigation rates on soil properties and plant nutrition under field conditions. Most RWW elements (>66%) are readily available as NH4+, Ca2+, Mg2+, K+, SO42-, Cl-, H3BO3, Mn2+ and Zn2+, but in imbalanced proportion for plant nutrition. Lead, Cd, Cr and Al in RWW are mostly bounded with DOM or OH. Irrigation with RWW decreased soil acidity, which is beneficial to the acidic tropical soil. Although RWW irrigation builds exchangeable Na+ up, the excessive Na+ was leached out of the soil profile after a rainy summer season (>400 mm). Benefits of the disposal of RWW to the soil under tropical conditions were discussed, however, the over irrigation with RWW (>100% of crop evapotranspiration) led to a nutritional imbalance, accumulating S and leading to a plant deficiency of P and K. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：54 / 61

页数：8

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